i=int(raw_input())
arr=[1000000,600000,400000,200000,100000,0]
rat=[0.01,0.0015,0.03,0.05,0.075,0.1]
r=0
#for idx in range(0,6):
idx=0
while (idx>=0 and idx<=5):
	if i>arr[idx]:
		r+=(i-arr[idx])*rat[idx]
		print (i-arr[idx])*rat[idx]
		i=arr[idx]	
	idx+=1
print r